The Energizer Size 312 Brown Zinc-Air Hearing Aid Batteries are reliable and long-lasting power sources for hearing aids. With an expiration date of May 2026, these batteries provide consistent performance for an extended period of time. The zinc-air chemical composition ensures a steady power output, making them a dependable choice for daily use. Easy to install and efficient, these batteries are a convenient and essential accessory for individuals relying on hearing aids in their daily lives.